Manufacture of horseshoe nails



Jan. 29, 1929.

1,700,685 A. MOELLER I MANUFACTURE OF HORSESHOE NAILS Filed May 15, 1928 2 Sheets-Sheet 1 O 0 I .p I c i a x V I 5 1 PF (L 7 WA a Jan. 29, 1929. 1,700,685

A.MOELLER MANUFACTURE OF HORSESHOE NAILS Filed may 15, 1928 2 Sheets-Sheet 2 L E 0 a I cl C Tt 0 a Patented Jan. 29,1929.

ADOLF MUELLER, or 'EIBERSWALDE, "NEAR BERLI N, GERMANY, assrsnon TO 0. ms;

' r V TAD&SON,OFOSLO,NORWAYJ 1 s MANUFACTURE or nonsnsnon NAILS.

Applieat ion fi1ed May 15, 1928, Serial No.

This invention relates tothe manufacture of horseshoe nails by a cold process and more especially to a process in which nails are formed from a'continnons wlre by a press ing'operation, the press being of the type generally called tour die press. The usual way to work such presses for this purpose is to feed the wire only about half way into the press, so that the shank oiithe nail will. after the pressing, beformed on the end oi the wire. .However, the press may also be will be left on the end of the wire.

worked in the way that the wire .t'ed so head its desired form can be effected while the blank is held between the dies of the four die press and part of the mould necessary for this operation may be formed by the dies themselves. c.

The improvements forming the subject matter of this invent-ion relatesto a machine operated in this manner and the invention has for its object to create a process by which nails may be formed having heads of a perfect form, and a machine of a cheap and simple construction and operation.

In the following the invention will be described reference being had to the annexed drawings, in which Fig. 1 is an elevation partly in section of the vital part of a horseshoenail machine, the drawing being a diagram showing the parts in the moment the press des are to make the first pressing movement.

Figs. 2-8 are diagrams showing the press dies and the iron rod in their consecutive positions during the forming of a nail blank. Fig. 9 shows only for matter of illustration a suitable form of a four die press, looking in the direction of the wire fed in between the dies.

The wire or rod (4, on the endof which the nail blank is to be formed by means of the tour radially disposed dies, of which 'two,jb and b are shown in. section in Fig. 1', is held'by a feeding arm e, which can be oscillated on the pivot 12 to and fro by means of a cam inacting against a roller a spring 9 pressing the arm against the said cam. in the said arm a gripper f actuated i from a cam 2' through the lever 70, the rod 277,864, and in Germany January 2, 1925.

so that thelever may move opposite the dirial rm-a; new nail. I

After the first pressing operation. (Fig. 2) the feeding levcrwill take the wire so thatthe head ofthe nail will have the posi- 'tion shown in Fig. 3, whereuponthe second the wir'e as indicated by the arrows y, partrection of the arrow in, to take hold of inatQ ly for the purpose otshortening the length of the pyramid m, part-lyfor the purpose to iositively prevent the slipping of the cor-i ners c of the dies on the pyramid in the second press operation.

In the position of parts Fig. 4, when the shank has the form n and the head the form m a suitable tool comes in action and gives the head its proper form, the sloping surfaces to oi the dies serving as a mould for the part of the head, uniting the same with the shank. 1

However thls riveting operation, which in itself i'orn' s no-part of the invention may also, as in other known machines,.be effected after the nail blank has been severed from the wire end. i I

The next to be done is now to press the pyramid 0 on the point end of'the nail, and this may be done by a third prelt'erably by a third'and a fourth pressing operation as illustrated in the Figures 5, 6 and 7 By these press operations the sharp corners (F of the dies grip int'o the material and as the operative faces oft-lie dies are diverging'from this corner, and tne cam his capable of exerting a certain resistance, thepressing out of this-pyramid so as to form the point of the nail blank very, close to the crown of the Fig. 8 and the nail blank may be severed by a blow of a hammer or byia cutting tool in'well known manner. The wire now has its original position (shown in Fig. 1) and the. pressing of a new nail commences. VV'hatIclaimis: 4 r 1. In the manufacture or horseshoe nails. by means of a fourdie'press, the process comprising firstcompressing a tapered head blank on the end'ofa wire, thereuponclam r ing the so-tormed blank a second time be?- I "tween the dies at points remote from the pointj end time While exerting a stretching action on the wire, whereby excessive displacement of the metal incident to the pressing izi the direction of the head blank, is inhibited and compressing the head blank thereafterwhile itiremains between the dies tocause it to fill a head shaped recess in said dies.

2. In the manufacture of horse shoe nails by means of a tour die press, the process comprising first compressing tapered head blank on the end of a Wire, thereupon clamp ingthe so-formed blank a secondtimebetween the dies at peints r'emote from the'point of least taper and pressing the head a second remains between the dies to cause it to fill a head shaped recess in said dles, advancing the Wire between the dies to bring anew portion of wlre ad acent the point of the nailbetween said d1es, and pressing sald new portion to form the point of the nail.

In testimony whereof I have name unto this specification.

ADOLF MUELLER.

signed my 

